Table 2. Alterations in plasma amino acid concentrations during pregnancy.
| Amino acids (µmol/l) |
Proestrus (P0) | P5 | P10 | P15 | P20 |
|---|---|---|---|---|---|
| Valine | 172.3 ± 17.9 | 247.3 ± 83.1 | 305.8 ± 85.3 | 211.1 ± 61.1 | 201.1 ± 64.6 |
| Leucine | 123.6 ± 11.0 | 124.5 ± 6.0 | 119.6 ± 4.0 | 107.5 ± 2.6 | 103.1 ± 9.6 |
| Isoleucine | 73.3 ± 7.6 | 74.9 ± 3.6 | 71.6 ± 2.2 | 66.3 ± 1.0 | 68.5 ± 7.4 |
| Alanine | 414.3 ± 26.3 | 361.6 ± 14.6 | 348.2 ± 15.7 | 373.8 ± 49.7 | 510.6 ± 33.6 |
| Methionine | 59.3 ± 4.3 | 60.3 ± 4.1 | 67.5 ± 4.4 | 57.8 ± 5.6 | 54.0 ± 3.2 |
| Proline | 191.6 ± 12.3 | 186.3 ± 13.0 | 171.7 ± 8.8 | 175.2 ± 12.6 | 184.1 ± 9.1 |
| Tryptophan | 119.3 ± 6.2 | 100.6 ± 1.2 | 106.2 ± 6.5 | 101.8 ± 4.3 | 62.4 ± 5.5* |
| Phenylalanine | 67.8 ± 3.6 | 61.1 ± 2.3 | 64.5 ± 3.2 | 58.8 ± 3.1 | 59.8 ± 4.9 |
| Tyrosine | 74.8 ± 5.2 | 64.0 ± 3.2 | 74.4 ± 6.7 | 51.9 ± 5.8* | 50.3 ± 4.9* |
| Threonine | 276.0 ± 16.1 | 235.1 ± 13.9 | 240.6 ± 21.0 | 268.7 ± 13.8 | 292.1 ± 23.9 |
| Glutamine | 601.1 ± 11.4 | 614.6 ± 20.7 | 623.2 ± 36.4 | 631.1 ± 39.5 | 598.8 ± 24.3 |
| Asparagine | 43.1 ± 5.0 | 40.1 ± 1.6 | 37.4 ± 1.6 | 37.7 ± 2.5 | 50.9 ± 3.2 |
| Serine | 246.4 ± 17.6 | 230.7 ± 6.2 | 207.5 ± 5.3* | 202.8 ± 8.8* | 221.8 ± 6.3 |
| Glycine | 272.2 ± 21.2 | 259.5 ± 9.3 | 232.2 ± 14.0 | 158.1 ± 7.9* | 127.6 ± 3.6* |
| Cysteine | ND | ND | ND | ND | ND |
| Lysine | 435.8 ± 19.8 | 422.1 ± 48.3 | 418.6 ± 31.2 | 527.4 ± 30.9 | 623.4 ± 60.3* |
| Arginine | 160.8 ± 20.0 | 174.6 ± 9.4 | 166.2 ± 4.4 | 162.1 ± 24.8 | 140.4 ± 8.7 |
| Histidine | 59.3 ± 4.6 | 58.9 ± 1.5 | 57.8 ± 3.1 | 44.8 ± 3.2* | 36.6 ± 2.1* |
| Aspartate | 11.9 ± 2.3 | 10.3 ± 2.1 | 8.3 ± 0.8 | 9.2 ± 1.1 | 9.0 ± 0.6 |
| Glutamate | 87.6 ± 12.5 | 82.8 ± 15.4 | 78.1 ± 10.4 | 80.2 ± 10.1 | 83.3 ± 10.6 |
The data represent the mean ± standard error of the mean (SEM, n=4). *; P<0.05 vs. non-pregnant female rats group.